In this story the main character name Yanagi Ryuu unfortunately died due to overworked one day a beautiful lady appear name Miyazu Yuki the goddess of reincarnation she wants to reincarnate Yanagi Ryuu in a fantasy world we're all monsters, dragons,and kingdoms and Yanagi Ryuu wants to reincarnate but he requested to be reborn because he doesn't want to be a baby so he wanted to be reborn in a 20 years old body and he can enjoy his second life on this amazing fantasy world.